You have an issue with the PATS security system which uses a chip in the key to allow the vehicle to start. You will need to have the vehicle scanned for trouble codes which will lead us to a starting point for the cause of the problem. Usually it is the key, but since you only have one key, you will need to get 2 new keys and have them both programmed. Mobile lock smiths can do this for you. You do not have to go to a dealership to have this done.